Cryptanalysis on secure fractal image coding based on fractal parameter encryption

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

6 Scopus Citations
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Author(s)

  • Ching-Hung Yuen
  • Kwok-Wo Wong

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)41-51
Journal / PublicationFractals
Volume20
Issue number1
Publication statusPublished - Mar 2012

Abstract

The vulnerabilities of the selective encryption scheme for fractal image coding proposed by Lian et al. 1 are identified. By comparing multiple cipher-images of the same plain-image encrypted with different keys, the positions of unencrypted parameters in each encoded block are located. This allows the adversary to recover the encrypted depth of the quadtree by observing the length of each matched domain block. With this depth information and the unencrypted parameters, the adversary is able to reconstruct an intelligent image. Experimental results show that some standard test images can be successfully decoded and recognized by replacing the encrypted contrast scaling factor and brightness offset with specific values. Some remedial approaches are suggested to enhance the security of the scheme. © 2012 World Scientific Publishing Company.

Research Area(s)

  • Cryptanalysis, Fractal Image Coding, Joint Image Compression and Encryption, Selective Encryption

Citation Format(s)

Cryptanalysis on secure fractal image coding based on fractal parameter encryption. / Yuen, Ching-Hung; Wong, Kwok-Wo.

In: Fractals, Vol. 20, No. 1, 03.2012, p. 41-51.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review